I have 7 - 1-gallon cans left over from a project original cost $27 per can at Home Depot.
Below description is off of Home Depot site.
The BEHR PREMIUM Concrete and Masonry Bonding Primer is a high-performance, ready-to-use pre-treatment for porous concrete.
This high-performance water-based primer will promote a uniform topcoat finish. Also creates a stronger adhesion between the coating and surface. Can be used on uncoated or previously coated surfaces.
Ideal for interior/exterior horizontal concrete, masonry, stucco, cinder block, brick and any other porous stone
Ready-to-use pre-treatment for porous concrete
For the best results, be sure to properly prepare the surface using other applicable preparation products as described in the label instructions.
Apply using a high-quality pump sprayer, 1/4 in. - 3/8 in. nap roller, nylon/polyester brush or a pad applicator.
Water-based formula promotes the adhesion of paints and stains to concrete.